Kubilay KARACİF, Hasan KARABULUT, Ramazan ÇITAK

BOR KARBÜR TAKVİYELİ ALÜMİNYUM ESASLI KOMPOZİT MALZEMELERİN TUZLU ORTAMDA KOROZYON DAVRANIŞININ İNCELENMESİ

Bu çalışmada, toz metalurjisi yöntemi kullanılarak elde edilen bor karbür (B4C) takviyeli alüminyum esaslı kompozit malzemelerin tuzlu ortamdaki korozyon davranışları incelenmiştir. Üretim esnasında, alüminyum ve bor karbür tozlarının homojen şekilde birbiri içerisinde dağılımını sağlamak için bir saat karıştırma veya farklı sürelerde mekanik alaşımlama işlemleri uygulanmıştır. Karıştırma veya farklı sürelerde uygulanan mekanik alaşımlama işlemleri sonrasında presleme ve sinterleme yapılarak elde edilen bor karbür takviyeli alüminyum esaslı kompozit malzemelere %3,5’luk tuzlu su (NaCl) ortamında potansiyodinamik korozyon testleri uygulanmıştır. Elektrokimyasal korozyon testleri sonucunda mekanik alaşımlama süresinin artması ile malzemenin korozyon hızının arttığı, korozyon dayanımının azaldığı belirlenmiştir.

Anahtar Kelimeler:

Alüminyum, bor karbür, toz metalurjisi, mekanik alaşımlama, korozyon

THE INVESTIGATION OF CORROSION BEHAVIOR OF ALUMINUM COMPOSITES REINFORCED WITH BORON CARBIDE IN SALTWATER MEDIUM

In the study, corrosion behaviors of powder metal aluminum composites reinforced with boron carbide (B4C) were investigated in saltwater medium. For the production of composite specimens, one hour mixing or mechanical alloying for different durations was applied to ensure uniform distribution of aluminum and boron carbide powders. After pressing and sintering treatment of specimens, electrochemical corrosion tests were applied in 3.5% NaCl solution by potentiodynamic methods. According to electrochemical corrosion test results, it was determined that the corrosion rate of material was increased and corrosion resistance decreased with the increase of mechanical alloying duration.

Keywords:

Aluminum, boron carbide, powder metallurgy, mechanical alloying, corrosion,

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